Encina Water Pollution Control Facility
Carlsbad, CA · San Diego County · Publicly Owned Treatment Works
- Average flow
- 23.78 MGD
- Design flow
- —
- NPDES permit
- CAL107395
- Effective
- Permit expires
- December 2030
- Population served
- 94,500
- CWNS 2022
Encina Water Pollution Control Facility is a publicly owned wastewater treatment works in Carlsbad, San Diego County, California treating an average of 23.78 million gallons per day, serving about 94,500 residents. Treatment on site includes clarifiers, biogas silos. It discharges under NPDES permit CAL107395 (effective), which expires in December 2030, with 11 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 11
- Effluent violations
- 1
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in Carlsbad
Carlsbad's capital improvement plan lists 53 water, sewer and wastewater line items worth $369M starting 2024–2030. The largest budgeted items are shown here.
All water and sewer capital projects in Carlsbad →
| Project | Budget | Years |
|---|---|---|
| Encina Capital Projects (EWPCF) | $159,938,000 | 2024–2039 |
| Water System Rehabilitation and Replacement | $55,970,000 | 2024–2039 |
| Sewer System Rehabilitation and Replacement | $37,400,000 | 2024–2039 |
| Water Valve Repair/Replacement Program | $15,680,000 | 2024–2039 |
| Buena Interceptor Sewer Improvements | $10,565,000 | 2025–2039 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
11 verified contacts for Encina Water Pollution Control Facility, with validated emails and direct phone numbers.
Unlock 11 verified contacts (8 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Encina Water Pollution Control Facility, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in California
Oceanside · 5 mi away
10.7 MGD
Cardiff · 7 mi away
1.06 MGD
Escondido · 12 mi away
7.8 MGD
Fallbrook · 18 mi away
1.07 MGD
Santee · 25 mi away
—
San Diego · 30 mi away
137 MGD
Dana Point · 32 mi away
11.47 MGD
Lake Elsinore · 39 mi away
—
Encina Water Pollution Control Facility: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed September 11, 2026; facility record last updated August 19, 2026.